//
//  Subject.m
//  LearnObjectiveC
//
//  Created by client on 2017/9/8.
//  Copyright © 2017年 吴可高. All rights reserved.
//

#import "Subject.h"

@implementation Subject
-(void)accept:(Visitor*)visitor;
{
}

-(NSString*)getSubject;
{
    return @"";
}
@end
